Java操作日期时间范例代码大全，java代码大全,package com.
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Java操作日期时间范例代码大全，java代码大全,package com.
package com.xtgd.main.util;import java.sql.Timestamp;import java.text.DateFormat;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.ArrayList;import java.util.Calendar;import java.util.Date;import java.util.List;import java.util.Locale;import org.apache.commons.lang.StringUtils;/** * 日期工具类 * * @author yugc */public final class DateUtil { private DateUtil() { } /** * yyyy-MM-dd */ public static final String FORMAT1 = "yyyy-MM-dd"; /** * yyyy.MM.dd */ public static final String FORMAT2 = "yyyy.MM.dd"; /** * yyyy/MM/dd */ public static final String FORMAT3 = "yyyy/MM/dd"; /** * yyyy-MM-dd HH:mm */ public static final String FORMAT4 = "yyyy-MM-dd HH:mm"; /** * yyyy.MM.dd HH:mm */ public static final String FORMAT5 = "yyyy.MM.dd HH:mm"; /** * yyyy/MM/dd HH:mm */ public static final String FORMAT6 = "yyyy/MM/dd HH:mm"; /** * yyyy-MM-dd HH:mm:ss */ public static final String FORMAT7 = "yyyy-MM-dd HH:mm:ss"; /** * YYYY-MM-dd HH-mm-ss */ public static final String FORMAT15 = "YYYY-MM-dd HH-mm-ss"; /** * yyyy.MM.dd HH:mm:ss */ public static final String FORMAT8 = "yyyy.MM.dd HH:mm:ss"; /** * yyyy/MM/dd HH:mm:ss */ public static final String FORMAT9 = "yyyy/MM/dd HH:mm:ss"; /** * yyyy_MM_dd_HH_mm_ss */ public static final String FORMAT10 = "yyyy_MM_dd_HH_mm_ss"; /** * yy-MM-dd */ public static final String FORMAT11 = "yy-MM-dd"; /** * yyyyMMdd */ public static final String FORMAT12 = "yyyyMMdd"; /** * yyyyMMddHHmmss */ public static final String FORMAT13 = "yyyyMMddHHmmss"; /** * yyyyMM */ public static final String FORMAT14 = "yyyyMM"; public static Date getCurrentDate() { return new Date(System.currentTimeMillis()); } public static Date getYesterDay() { return addDay(new Date(System.currentTimeMillis()), -1); } public static String getYesterDayString() { return parseDateToString(addDay(new Date(System.currentTimeMillis()), -1), FORMAT1); } /** * 得到年月日的路径 * @return */ public static String getThisYearMonthDay(String dateString) { Date date = parseStringToDate(dateString, FORMAT12); return DateUtil.getYear(date) + "/" + DateUtil.getMonth(date) + "/" + DateUtil.getDay(date) + "/"; } /** * 返回当前日期或时间 * * @param format * @return */ public static String getCurrentDate(String format) { if (StringUtils.isBlank(format)) { format = FORMAT1; } Date date = new Date(); SimpleDateFormat formatter = new SimpleDateFormat(format); String currentTime = formatter.format(date); return currentTime; } /** * 返回当前时间 * * @return */ public static String getCurrentTime() { String datetime = getCurrentDate(FORMAT7); String time = datetime.substring(datetime.indexOf(" ") + 1); return time; } /** * 返回当前时间加随机数 * * @return */ public static String getCurrentDateTimeRandom() { String datetime = getCurrentDate(DateUtil.FORMAT10) + "_" + Math.random(); return datetime; } /** * 返回当前时间和日期 * @return */ public static String getCurrentDateTimeString() { return getCurrentDate(DateUtil.FORMAT7); } /** * 返回当前日期 * * @return */ public static Date getCurrentDateTime() { String datetime = getCurrentDate(FORMAT7); return parseStringToDate(datetime, ""); } public static Timestamp getCurrentTimestamp() { String datetime = getCurrentDate(FORMAT7); return parseStringToTimestamp(datetime, ""); } public static Timestamp getCurrentTimestamp(String format) { String datetime = getCurrentDate(format); return parseStringToTimestamp(datetime, ""); } /** * 日期转换为字符串 * * @param date 日期 * @param format 格式 * @return 返回字符型日期 */ public static String parseDateToString(Date date, String format) { String result = ""; DateFormat formatter = null; try { if (date != null) { if (StringUtils.isBlank(format)) { formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); } else { formatter = new SimpleDateFormat(format); } result = formatter.format(date); } } catch (Exception e) { } return result; } /** * 时间1-时间2的毫秒 * * @param t1 * @param t2 * @return */ public static long between(Timestamp t1, Timestamp t2) { if ((t1 != null) && (t2 != null)) { return t1.getTime() - t2.getTime(); } return 0; } /** * 两个日期date1-date2相减，相差的天数 * * @param date1 * 日期 * @param date2 * 日期 * @return 返回相减后的日期 */ public static int betweenTwoDates(Date date1, Date date2) { return (int) ((getMillis(date1) - getMillis(date2)) / (24 * 3600 * 1000)); } /** * 将字符串转换为日期 * * @param str * @return * @throws ParseException */ public static Date parseStringToDate(String str, String format) { DateFormat formatter = null; Date date = null; if (StringUtils.isNotBlank(str)) { if (StringUtils.isBlank(format)) { formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); } else { formatter = new SimpleDateFormat(format); } try { date = formatter.parse(str); } catch (ParseException e) { e.printStackTrace(); } } return date; } /** * 返回2007到今年的年份 * * @return */ public static List<Integer> get2007ToThisYear() { // 当前时间 Calendar c = Calendar.getInstance(); c.setTime(new Date()); // 返回的年份 List<Integer> the2007ToThisYearList = new ArrayList<Integer>(); // 当前年 int thisYear = c.get(Calendar.YEAR); for (int i = thisYear; i >= 2007; i--) { the2007ToThisYearList.add(i); } return the2007ToThisYearList; } /** * 获取当前月的前几个月份的时间 * @param months * @return */ public static Date getDateBeforeMonths(int months) { // 当前时间 Calendar c = Calendar.getInstance(); c.add(Calendar.MONTH, -months); return c.getTime(); } /** * 获取当前日期的前几天的时间 * @param days * @return */ public static Date getDateBeforeDays(int days) { // 当前时间 Calendar c = Calendar.getInstance(); c.add(Calendar.DATE, -days); return c.getTime(); } /** * 返回1-12月份 * * @return */ public static List<String> getAllMonth() { List<String> theMonthList = new ArrayList<String>(); for (int i = 1; i < 13; i++) { if (i < 10) { theMonthList.add("0" + i); } else { theMonthList.add("" + i); } } return theMonthList; } /** * 返回日期中的年份 * * @param date * 日期 * @return 返回年份 */ public static int getYear(Date date) { Calendar c = Calendar.getInstance(); c.setTime(date); return c.get(Calendar.YEAR); } /** * 返回日期中的月份 * * @param date * 日期 * @return 返回月份 */ public static int getMonth(Date date) { Calendar c = Calendar.getInstance(); c.setTime(date); return c.get(Calendar.MONTH) + 1; } /** * 返回日期中的日 * * @param date * 日期 * @return 返回日 */ public static int getDay(Date date) { Calendar c = Calendar.getInstance(); c.setTime(date); return c.get(Calendar.DAY_OF_MONTH); } /** * 返回日期中的小时 * * @param date * 日期 * @return 返回小时 */ public static int getHour(Date date) { Calendar c = Calendar.getInstance(); c.setTime(date); return c.get(Calendar.HOUR_OF_DAY); } /** * 返回日期中的分钟 * * @param date * 日期 * @return 返回分钟 */ public static int getMinute(Date date) { Calendar c = Calendar.getInstance(); c.setTime(date); return c.get(Calendar.MINUTE); } /** * 返回日期中的秒钟 * * @param date * 日期 * @return 返回秒钟 */ public static int getSecond(Date date) { Calendar c = Calendar.getInstance(); c.setTime(date); return c.get(Calendar.SECOND); } /** * 返回日期代表的毫秒 * * @param date * 日期 * @return 返回毫秒 */ public static long getMillis(Date date) { Calendar c = Calendar.getInstance(); c.setTime(date); return c.getTimeInMillis(); } /** * 返回当前日期代表的毫秒 * * @return */ public static long getCurrentTimeMillis() { return System.currentTimeMillis(); } public static Date addMonth(Date date, int month) { Calendar c = Calendar.getInstance(); c.setTime(date); c.add(c.MONTH, month); return c.getTime(); } /** * 日期加天数,可以向前加，向后加 * * @param date * 日期 * @param day * 天数 * @return 返回相加后的日期 */ public static Date addDay(Date date, int day) { Calendar c = Calendar.getInstance(); c.setTimeInMillis(getMillis(date) + ((long) day) * 24 * 3600 * 1000); return c.getTime(); } /** * 日期加秒数,可以向前加，向后加 * * @param date * 日期 * @param second * 秒数 * @return 返回相加后的日期 */ public static Date addSecond(Date date, long second) { Calendar c = Calendar.getInstance(); c.setTimeInMillis(getMillis(date) + second * 1000); return c.getTime(); } /** * 根据一个日期，返回是星期几 * * @param sdate * @return */ public static String getWeekByDate(String sdate) { // 再转换为时间 Date date = parseStringToDate(sdate, ""); Calendar c = Calendar.getInstance(); c.setTime(date); int day = c.get(Calendar.DAY_OF_WEEK); // day中存的就是星期几了，其范围 1~7 // 1=星期日 7=星期六，其他类推 return day + ""; } /** * 根据一个日期，返回是星期几 * 1=星期日 7=星期六，其他类推 * * @param sdate * @return */ public static int getWeekByDate(Date date) { // 再转换为时间 Calendar c = Calendar.getInstance(); c.setTime(date); // day中存的就是星期几了，其范围 1~7 // 1=星期日 7=星期六，其他类推 return c.get(Calendar.DAY_OF_WEEK); } /** * 日期为一年中的第几周 * @return */ public static String getWeekNum(Date date) { Calendar c = Calendar.getInstance(Locale.CHINA); c.setTime(date); String week = Integer.toString(c.get(Calendar.WEEK_OF_YEAR)); return week; } public static java.sql.Date parseUtilDateToSqlDate(Date date) { if (date != null) { return new java.sql.Date(date.getTime()); } else { return null; } } public static java.sql.Date parseStringToSqlDate(String dateStr, String format) { Date date = null; if (StringUtils.isBlank(format)) { date = parseStringToDate(dateStr, "yyyy-MM-dd HH:mm:ss"); } else { date = parseStringToDate(dateStr, format); } return parseUtilDateToSqlDate(date); } public static Timestamp parseUtilDateToTimestamp(Date date, String format) { return parseStringToTimestamp(parseDateToString(date, format), format); } public static Date parseTimestampToUtilDate(Timestamp date, String format) { return parseStringToDate(parseDateToString(date, format), format); } public static Timestamp parseStringToTimestamp(String dateStr, String format) { if (StringUtils.isBlank(dateStr)) { return null; } Date date = null; if (StringUtils.isBlank(format)) { date = parseStringToDate(dateStr, "yyyy-MM-dd HH:mm:ss"); } else { date = parseStringToDate(dateStr, format); } if (date != null) { long t = date.getTime(); return new Timestamp(t); } else { return null; } } /** * 获取时间2099-12-31，23:59:59 * * @return */ public static Timestamp getMaxTimestamp() { return DateUtil.parseStringToTimestamp("2099-12-31 23:59:59", DateUtil.FORMAT7); } /** * 返回日期中的年月日，格式化成yyyyMMdd * @param date * @return */ public static String getYearMonthDay(Date date) { SimpleDateFormat formatter = new SimpleDateFormat(FORMAT12); String currentTime = formatter.format(date); return currentTime; } /** * 取得指定月份的第一天 * * @param strdate String * @return String */ public static String getMonthBegin(String strdate) { return parseDateToString(parseStringToDate(strdate, "yyyy-MM"), ""); } /** * 取得指定月份的最后一天 * * @param strdate String * @return String */ public static String getMonthEnd(String strdate) { Date date = parseStringToDate(getMonthBegin(strdate), ""); Calendar calendar = Calendar.getInstance(); calendar.setTime(date); calendar.add(Calendar.MONTH, 1); calendar.add(Calendar.DAY_OF_YEAR, -1); return parseDateToString(calendar.getTime(), ""); } public static String getPreviousMonthBegin() { Calendar cal = Calendar.getInstance(); cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - 1); Date date = new Date(cal.getTimeInMillis()); return parseDateToString(parseStringToDate(parseDateToString(date, FORMAT1), "yyyy-MM"), FORMAT1); } public static String getPreviousMonthEnd() { Date date = parseStringToDate(getPreviousMonthBegin(), FORMAT1); Calendar calendar = Calendar.getInstance(); calendar.setTime(date); calendar.add(Calendar.MONTH, 1); calendar.add(Calendar.DAY_OF_YEAR, -1); return parseDateToString(calendar.getTime(), FORMAT1); } /** * 上个月 * * @return */ public static String getPreviousMonth() { Calendar cal = Calendar.getInstance(); cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - 1); Date date = new Date(cal.getTimeInMillis()); return parseDateToString(parseStringToDate(parseDateToString(date, FORMAT1), "yyyy-MM"), FORMAT14); } /** * 上两个月 * * @return */ public static String getPreviousTwoMonth() { Calendar cal = Calendar.getInstance(); cal.set(Calendar.MONTH, cal.get(Calendar.MONTH) - 2); Date date = new Date(cal.getTimeInMillis()); return parseDateToString(parseStringToDate(parseDateToString(date, FORMAT1), "yyyy-MM"), FORMAT14); } /** * 判断两个日期是否在同一周 * @param date1 * @param date2 * @return */ public static boolean isSameWeekDates(Date date1, Date date2) { Calendar cal1 = Calendar.getInstance(); Calendar cal2 = Calendar.getInstance(); cal1.setTime(date1); cal2.setTime(date2); int subYear = cal1.get(Calendar.YEAR) - cal2.get(Calendar.YEAR); if (0 == subYear) { if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)) { return true; } } else if ((1 == subYear) && (11 == cal2.get(Calendar.MONTH))) { // 如果12月的最后一周横跨来年第一周的话则最后一周即算做来年的第一周 if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)) { return true; } } else if ((-1 == subYear) && (11 == cal1.get(Calendar.MONTH))) { if (cal1.get(Calendar.WEEK_OF_YEAR) == cal2.get(Calendar.WEEK_OF_YEAR)) { return true; } } return false; } public static void main(String[] args) { System.out.println(getPreviousMonthBegin()); System.out.println(getPreviousMonthEnd()); System.out.println(getYearMonthDay(new Date())); System.out.println(getYearMonthDay(parseStringToDate("2009-11-2 12:1:21", FORMAT7))); System.out.println("current time: " + getCurrentDateTime()); System.out.println("addsecond: " + addSecond(getCurrentDateTime(), -1L)); Date date = new Date(); System.out.println("current date: " + date.toString()); System.out.println("test parseDateToString: " + parseDateToString(date, "")); System.out.println("test parseStringToDate: " + parseStringToDate("1990-01-1 00:00:00", "")); System.out.println("test getYear: " + getYear(date)); System.out.println("test getMonth: " + getMonth(date)); System.out.println("test getDay: " + getDay(date)); System.out.println("test getHour: " + getHour(date)); System.out.println("test getMinute: " + getMinute(date)); System.out.println("test getSecond: " + getSecond(date)); System.out.println("test getMillis: " + getMillis(date)); System.out.println("test addDate: " + addDay(date, 2)); System.out.println("test betweenTwoDays: " + betweenTwoDates(date, addDay(date, 2))); System.out.println("test getWeekNum: " + getWeekNum(addDay(date, -2))); System.out.println("test getWeekByDate: " + getWeekByDate(parseDateToString(date, ""))); System.out.println("test getMonthBegin: " + getMonthBegin(parseDateToString(date, ""))); System.out.println("test getMonthEnd: " + getMonthEnd(parseDateToString(date, ""))); System.out.println("test isSameWeekDates: " + isSameWeekDates(date, addDay(date, -2))); System.out.println(getPreviousTwoMonth()); System.out.println(getPreviousMonth()); List<Integer> yearList = get2007ToThisYear(); List<String> monthList = getAllMonth(); } public static String addOneDay(String stopTime) { String finishTime = stopTime; Date finishDate = null; if(stopTime != null && !"".equals(stopTime)) { if(stopTime.length() < 19) { finishTime = stopTime.substring(0, 10) + " 00:00:00"; } finishDate = DateUtil.parseStringToDate(finishTime, DateUtil.FORMAT7); finishDate = DateUtil.addDay(finishDate, 1); return DateUtil.parseDateToString(finishDate, DateUtil.FORMAT7); }else{ return null; } } /** * 给date加1天 * @param date * @return */ public static Date addOneDay(Date date) { Calendar calendar = Calendar.getInstance(); calendar.setTime(date); calendar.add(Calendar.DATE, 1); return calendar.getTime(); }}
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